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, ITEDSTAWENT orrion GREENE; orBRineEPonT, ooivivnoriour.

IToaZZ @Lo/Lomi" ngg/conoeq" y n, v

l Be it known that LMNBLE 7T. Garmin, ot' i v Bridgeportginth`e1Srtat`e" `f1Gonnecticnt, have y n invented certain fnewl d" usefulImproves ments "ini fthe i Apparatus or @Operating the 1 "Cut-Oli Valvesot'Steain nginesL and Regi ulatingith'e Samepofwhi hefollowing is (afull,.clear, andfeXact description, reference l p being-.had to* the yaccompanying drawings,

Figureylfisafrontfelevationg and Fig. 2, an end elevationfofmyiinprovedapparatus. n The same letters` indicate like `parts in ffboth thefiguresly said nventionthe valvesare con- Inm n "gortheir equivalents,"any suitable mode of connection, andthese"` levers are operated in n rone direction` Lloy`` theclosing of fthe "valves,

`either by their gravity, byweights connected insure the rapidclosingkof the ports, and in the opposite, directionsl to open the portsby `means ottwo spring tappetsmounted on, or `infa sliding bar having "a"positivelongitudinal motion derived yfrom an eccentric or other`suitable part of the engineydand the said tappets are freezgtoslide.on,`or` in the y said bar, and at rightjangles to its length, forthe purpose'` of passingby thelevers in thereturn metio-mf and ofbeingadjusted to `any portion ot the stroke, and to `admit of 1adjustmenttoliberate the valves at any portion of the strokeofthe"pistonl And this part of my invention consists in combining with the4levers` that operate the. valves the spring tappets on the slidingbar,'when the i lsaid tappets aremovableon the said `sliding Y bar atyright angles to the `lineof` its motion, y or nearly so, to permit`the, return of the tappets after the valveshave `been closed rapidly bygravity orl the `equivalentithereof, "and preparatory to `thereopeningof the valves. And my,` invention also consists in y regulating theperiods of closingthe valves by means oa gage bar which isadjustible 'nby a governorforjother.` means, when combined with thespring tappetstoregulatc their position andthereby determine the pei riods ofliberating the ,valves that `they may be closed by gravity'or otherequivalent means, `while the periods of opening the valvesremainunchanged;` i y In the accompanyingdrawingsfa, a, represent `two slidevalves (for which other `making part of this".` specification, `in,which-- I nected" with,-andoperated by, rocking levers 1therewith,or"`any"other suitable means, to*

` valves may be substituted) connected by` Y, s i "cuir-yorin vaLvE Ynon STEAM-ENGINES.

speincation bf riettersrfeht No. 12,507, datedivrarch 13,' i855.

rods I), b, with the upper arms of two rockl ing levers c, c, mountedonarbors d, (l, havlng arms e, e, to whichare suspended weights f, f, `toclose the valves when the levers c, o, are liberated. HWhen the`valvesare closed,

fthewrock levers are vertical for ahorizontal engine, although thisposition may be varied.

Below the two rock levers is placed a bar g, mounted `in suitablestandards z., h, and receiving a positive longitudinal motion from aneccentric z', or other suitable `part `ofthe engine. And in this bar aretwo mortises passing through it at right angles to its length and inwhich are fitted, so as to work therein freely but accurately, twotappets j, `y', formed with shoulders 7c, k, to determine the limit oftheir motion downward.'

and forced upward by a spring Z, vattached to the lower face of the barand acting by its tension to'force the tappets upward and `against thelower edge of a gage bar m, placed parallel with the line of motion ofthe t'appet bar. This gage bar has a perpendicular stem n, `fitted toslide in a standard o, where it can be held by a setscrew or other knownmeans at any point of adjustment re` quired. Or instead of this the stemmay be connected with the `governor to determine by the velocity of theengine the position of the gage bar, and hence the height to which thetappets may be forced up by the spring which will determine the periodof closing the valves. n

`It will be seen from the foregoing that as the tappet bar moves in thedirection of the arrow one of the tappets is brought in contact with theinner face of the lower arm of one of the levers and causes it to turnon its axis and thereby to open the corresponding valve. And while thistakes place the other tappet passes under the other rocking leverwithout moving it, the tappet and lever being rounded so that when theycome vin contact the tappet will be `forced down until it shallhavepassed by the lever, when the spring forces it up so that on the returnelevation y of the tappets,-`that is, the lower Y the tappets are thequicker they Will liberate the levers, and vice versa; and therefore bysimply elevating or depressing the gage bar the period of closing thevalves can be changed While the period of opening them remains the same.i

I do not Wish to be understood as limiting myself to the specialconstruction and arrangement of the several parts, but to cover allmerely formal variations.

What I claim as my invention and desire to secure by Letters Patent isl.Combining with the rocking levers, or their equivalents, for operatingthe Valves the spring tappets on the sliding bars, subi NOBLE T. GREENE.Vitnesses:

WM. T. BISHOP, ANDREW DE LACY.

